deps: update ICU to 64.2

Update the version of the bundled ICU (deps/icu-small) to ICU version
64.2 (Unicode 12, CLDR 35)

Fixes: https://github.com/nodejs/node/issues/26388

PR-URL: https://github.com/nodejs/node/pull/27361
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Steven R Loomis <srloomis@us.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

1 files changed, 317 insertions, 0 deletions

diff --git a/deps/icu-small/source/i18n/unicode/formattedvalue.h b/deps/icu-small/source/i18n/unicode/formattedvalue.h
new file mode 100644
index 0000000000..2e24c8d99e
--- /dev/null
+++ b/deps/icu-small/source/i18n/unicode/formattedvalue.h
@@ -0,0 +1,317 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#ifndef __FORMATTEDVALUE_H__
+#define __FORMATTEDVALUE_H__
+
+#include "unicode/utypes.h"
+#if !UCONFIG_NO_FORMATTING
+#ifndef U_HIDE_DRAFT_API
+
+#include "unicode/appendable.h"
+#include "unicode/fpositer.h"
+#include "unicode/unistr.h"
+#include "unicode/uformattedvalue.h"
+
+U_NAMESPACE_BEGIN
+
+/**
+ * \file
+ * \brief C++ API: Abstract operations for localized strings.
+ *
+ * This file contains declarations for classes that deal with formatted strings. A number
+ * of APIs throughout ICU use these classes for expressing their localized output.
+ */
+
+
+/**
+ * Represents a span of a string containing a given field.
+ *
+ * This class differs from FieldPosition in the following ways:
+ *
+ *   1. It has information on the field category.
+ *   2. It allows you to set constraints to use when iterating over field positions.
+ *   3. It is used for the newer FormattedValue APIs.
+ *
+ * This class is not intended for public subclassing.
+ *
+ * @draft ICU 64
+ */
+class U_I18N_API ConstrainedFieldPosition : public UMemory {
+  public:
+
+    /**
+     * Initializes a ConstrainedFieldPosition.
+     *
+     * By default, the ConstrainedFieldPosition has no iteration constraints.
+     *
+     * @draft ICU 64
+     */
+    ConstrainedFieldPosition();
+
+    /** @draft ICU 64 */
+    ~ConstrainedFieldPosition();
+
+    /**
+     * Resets this ConstrainedFieldPosition to its initial state, as if it were newly created:
+     *
+     * - Removes any constraints that may have been set on the instance.
+     * - Resets the iteration position.
+     *
+     * @draft ICU 64
+     */
+    void reset();
+
+    /**
+     * Sets a constraint on the field category.
+     *
+     * When this instance of ConstrainedFieldPosition is passed to FormattedValue#nextPosition,
+     * positions are skipped unless they have the given category.
+     *
+     * Any previously set constraints are cleared.
+     *
+     * For example, to loop over only the number-related fields:
+     *
+     *     ConstrainedFieldPosition cfpos;
+     *     cfpos.constrainCategory(UFIELDCATEGORY_NUMBER_FORMAT);
+     *     while (fmtval.nextPosition(cfpos, status)) {
+     *         // handle the number-related field position
+     *     }
+     *
+     * Changing the constraint while in the middle of iterating over a FormattedValue
+     * does not generally have well-defined behavior.
+     *
+     * @param category The field category to fix when iterating.
+     * @draft ICU 64
+     */
+    void constrainCategory(int32_t category);
+
+    /**
+     * Sets a constraint on the category and field.
+     *
+     * When this instance of ConstrainedFieldPosition is passed to FormattedValue#nextPosition,
+     * positions are skipped unless they have the given category and field.
+     *
+     * Any previously set constraints are cleared.
+     *
+     * For example, to loop over all grouping separators:
+     *
+     *     ConstrainedFieldPosition cfpos;
+     *     cfpos.constrainField(UFIELDCATEGORY_NUMBER_FORMAT, UNUM_GROUPING_SEPARATOR_FIELD);
+     *     while (fmtval.nextPosition(cfpos, status)) {
+     *         // handle the grouping separator position
+     *     }
+     *
+     * Changing the constraint while in the middle of iterating over a FormattedValue
+     * does not generally have well-defined behavior.
+     *
+     * @param category The field category to fix when iterating.
+     * @param field The field to fix when iterating.
+     * @draft ICU 64
+     */
+    void constrainField(int32_t category, int32_t field);
+
+    /**
+     * Gets the field category for the current position.
+     *
+     * The return value is well-defined only after
+     * FormattedValue#nextPosition returns TRUE.
+     *
+     * @return The field category saved in the instance.
+     * @draft ICU 64
+     */
+    inline int32_t getCategory() const {
+        return fCategory;
+    }
+
+    /**
+     * Gets the field for the current position.
+     *
+     * The return value is well-defined only after
+     * FormattedValue#nextPosition returns TRUE.
+     *
+     * @return The field saved in the instance.
+     * @draft ICU 64
+     */
+    inline int32_t getField() const {
+        return fField;
+    }
+
+    /**
+     * Gets the INCLUSIVE start index for the current position.
+     *
+     * The return value is well-defined only after FormattedValue#nextPosition returns TRUE.
+     *
+     * @return The start index saved in the instance.
+     * @draft ICU 64
+     */
+    inline int32_t getStart() const {
+        return fStart;
+    }
+
+    /**
+     * Gets the EXCLUSIVE end index stored for the current position.
+     *
+     * The return value is well-defined only after FormattedValue#nextPosition returns TRUE.
+     *
+     * @return The end index saved in the instance.
+     * @draft ICU 64
+     */
+    inline int32_t getLimit() const {
+        return fLimit;
+    }
+
+    ////////////////////////////////////////////////////////////////////
+    //// The following methods are for FormattedValue implementers; ////
+    //// most users can ignore them.                                ////
+    ////////////////////////////////////////////////////////////////////
+
+    /**
+     * Gets an int64 that FormattedValue implementations may use for storage.
+     *
+     * The initial value is zero.
+     *
+     * Users of FormattedValue should not need to call this method.
+     *
+     * @return The current iteration context from {@link #setInt64IterationContext}.
+     * @draft ICU 64
+     */
+    inline int64_t getInt64IterationContext() const {
+        return fContext;
+    }
+
+    /**
+     * Sets an int64 that FormattedValue implementations may use for storage.
+     *
+     * Intended to be used by FormattedValue implementations.
+     *
+     * @param context The new iteration context.
+     * @draft ICU 64
+     */
+    void setInt64IterationContext(int64_t context);
+
+    /**
+     * Determines whether a given field should be included given the
+     * constraints.
+     *
+     * Intended to be used by FormattedValue implementations.
+     *
+     * @param category The category to test.
+     * @param field The field to test.
+     * @draft ICU 64
+     */
+    UBool matchesField(int32_t category, int32_t field) const;
+
+    /**
+     * Sets new values for the primary public getters.
+     *
+     * Intended to be used by FormattedValue implementations.
+     *
+     * It is up to the implementation to ensure that the user-requested
+     * constraints are satisfied. This method does not check!
+     *
+     * @param category The new field category.
+     * @param field The new field.
+     * @param start The new inclusive start index.
+     * @param limit The new exclusive end index.
+     * @draft ICU 64
+     */
+    void setState(
+        int32_t category,
+        int32_t field,
+        int32_t start,
+        int32_t limit);
+
+  private:
+    int64_t fContext = 0LL;
+    int32_t fField = 0;
+    int32_t fStart = 0;
+    int32_t fLimit = 0;
+    int32_t fCategory = UFIELD_CATEGORY_UNDEFINED;
+    int8_t fConstraint = 0;
+};
+
+
+/**
+ * An abstract formatted value: a string with associated field attributes.
+ * Many formatters format to classes implementing FormattedValue.
+ *
+ * @draft ICU 64
+ */
+class U_I18N_API FormattedValue /* not : public UObject because this is an interface/mixin class */ {
+  public:
+    /** @draft ICU 64 */
+    virtual ~FormattedValue();
+
+    /**
+     * Returns the formatted string as a self-contained UnicodeString.
+     *
+     * If you need the string within the current scope only, consider #toTempString.
+     *
+     * @param status Set if an error occurs.
+     * @return a UnicodeString containing the formatted string.
+     *
+     * @draft ICU 64
+     */
+    virtual UnicodeString toString(UErrorCode& status) const = 0;
+
+    /**
+     * Returns the formatted string as a read-only alias to memory owned by the FormattedValue.
+     *
+     * The return value is valid only as long as this FormattedValue is present and unchanged in
+     * memory. If you need the string outside the current scope, consider #toString.
+     *
+     * The buffer returned by calling UnicodeString#getBuffer() on the return value is
+     * guaranteed to be NUL-terminated.
+     *
+     * @param status Set if an error occurs.
+     * @return a temporary UnicodeString containing the formatted string.
+     *
+     * @draft ICU 64
+     */
+    virtual UnicodeString toTempString(UErrorCode& status) const = 0;
+
+    /**
+     * Appends the formatted string to an Appendable.
+     *
+     * @param appendable
+     *         The Appendable to which to append the string output.
+     * @param status Set if an error occurs.
+     * @return The same Appendable, for chaining.
+     *
+     * @draft ICU 64
+     * @see Appendable
+     */
+    virtual Appendable& appendTo(Appendable& appendable, UErrorCode& status) const = 0;
+
+    /**
+     * Iterates over field positions in the FormattedValue. This lets you determine the position
+     * of specific types of substrings, like a month or a decimal separator.
+     *
+     * To loop over all field positions:
+     *
+     *     ConstrainedFieldPosition cfpos;
+     *     while (fmtval.nextPosition(cfpos, status)) {
+     *         // handle the field position; get information from cfpos
+     *     }
+     *
+     * @param cfpos
+     *         The object used for iteration state. This can provide constraints to iterate over
+     *         only one specific category or field;
+     *         see ConstrainedFieldPosition#constrainCategory
+     *         and ConstrainedFieldPosition#constrainField.
+     * @param status Set if an error occurs.
+     * @return TRUE if a new occurrence of the field was found;
+     *         FALSE otherwise or if an error was set.
+     *
+     * @draft ICU 64
+     */
+    virtual UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const = 0;
+};
+
+
+U_NAMESPACE_END
+
+#endif  /* U_HIDE_DRAFT_API */
+#endif /* #if !UCONFIG_NO_FORMATTING */
+#endif // __FORMATTEDVALUE_H__